Synthesis of Carbon Nanotubes from High-Density Polyethylene Waste

Abstract

This article presents results of carbon nanotubes synthesis from household high-density polyethylene waste by thermal decomposition. A specific feature of this work is that the decomposition of high-density polyethylene waste and synthesis of carbon nanotubes were carried out in one-step using three-zone chemical vapor deposition reactor. The effect of temperature in the range of 450‒550 °C on decomposition products of high-density polyethylene was investigated. The decomposition products of polyethylene wastes were investigated by IR Fourier spectroscopy. Cenospheres obtained from ash and slag waste from thermal power plants during coal combustion were used as a catalyst for the synthesis of carbon nanotubes. The cenospheres were impregnated with an aqueous solution of iron nitrate. It was found that as a result of thermal decomposition of high-density polyethylene waste at temperature of 450 °C, gaseous carbon-containing compounds are formed, which upon further heating to 800 °C lead to the formation of carbon nanotubes with a diameter of 16‒21 nm on the surface of catalyst. Physicochemical analysis showed that turbostratic carbon is almost completely absent in the formed product. Carbon nanotubes analysis was performed by scanning electron microscopy and Raman spectroscopy.

Carbon-Based Nanostructures as Emerging Materials for Gene Delivery Applications

“…The length of MWCNTs was between 2600 and 3200 nm and the MWCNT’s diameter was 50 nm [ 82 ]. Smagulova and coworkers synthesized CNT from high-density polyethylene waste in a one-step CVD process [ 83 ]. The results of the physicochemical analysis confirmed the absence of turbostratic carbon in the final products [ 83 ].…”

“…Smagulova and coworkers synthesized CNT from high-density polyethylene waste in a one-step CVD process [ 83 ]. The results of the physicochemical analysis confirmed the absence of turbostratic carbon in the final products [ 83 ]. Tang and coworkers nominated some prominent methods in progressing the quality of CVD-grown 2D components [ 84 ].…”

Pitch-based carbon fibers: preparation and applications

“…Carbon nanomaterials (CNM) like as: carbon fibers (CF), activated carbon (AC), nanotubes (CNTs), graphene (Gr), carbon quantum dots (CQDs), in view of their excellent physicochemical, sorption, mechanical and electrical properties, find wide application in various areas of human life [1][2][3][4][5]. So, for example, they are used in water purification [6][7][8][9][10], various energy-intensive systems [11,12], catalyst carriers [13][14][15], sensors [15][16][17][18][19], targeted delivery of drugs [20][21][22][23] and etc.…”